Shiva Purana
॥ ऋषिरुवाच ॥ एवन्देवी समुत्पन्ना शुंभासुरनिबर्हिणी ॥ प्रोक्ता सरस्वती साक्षादुमांशाविर्भवा नृप ॥ ५०॥
Thus was the goddess, slayer of Śumbha born. She is said to be Sarasvatī. O king, she has manifested herself as a part of Umā.
english translation
॥ RSiruvAca ॥ evandevI samutpannA zuMbhAsuranibarhiNI ॥ proktA sarasvatI sAkSAdumAMzAvirbhavA nRpa ॥ 50॥
hk transliteration by Sanscript